It works for the sort of supers I'd want to run... relatively low-powered, potential for death... a grittier, darker sort than found in most mainstream comics I'd guess.
If it doesn't work so well for the 4-color stuff... well, from what I've seen there is a lot of argument about which, if any, system does.
Trying to emulate comics seems pretty tough when they are written to work at the 'speed-of-plot'... no hard and fast underlying rules... action paced out according to the needs of storytelling... cool moments that owe as much to good graphic design/illustration as they do writing.
I think emulating another medium always leads to difficulties... and rubs up against varying expectations.
I guess I'm saying that BRP does superheros fine... but, like any other system, it does them in it's own way... and if someone writes a monograph that runs with those strengths I'd be in line to buy it. Trying to make it into something it isn't... that I'm less interested in.